SENA PS810 - Manual (Page 65)

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Figure 4-17 Serial parameter configuration (PS810)
4.2.7. Modem Configuration
The Pro Series supports direct modem connection to the serial port. When user wants to connect to a
modem on its serial port, he must configure Modem init-string and DCD behavior on the modem
configuration page. The Pro Series supports modem connection only when host mode is set as TCP
mode.
 Enable/Disable modem
By enabling this menu, user can attach a modem directly to the serial port of Pro Series. If this
parameter is enabled, Pro Series considers this port will be used for modem use exclusively.
 Modem init-string
User can specify modem initialization string for his modem in Modem init-string parameter. When a
serial port is set to modem mode by setting Enable/Disable modem parameter as Enabled, Pro Series
sends modem initialization string to the serial port whenever rising edge of DTR pin is detected or
parameter related with serial port configuration is changed.
 DCD behavior
If DCD behavior is set as Allow TCP connection only by HIGH, Pro Series permits a connection from
the remote host only when the DCD status of serial port is high. This feature is useful when user want
to use a serial port only for dial-in modem mode. In this case, if there is no connection through modem
already, Pro Series will not permit a TCP side connection.